Blender for Criminalistic
I would advise against any serious use other than for the purpose of visualization - you can:


create 3D portrait of suspects
where and how the body fell with rag-doll physics
how a skull was fractured when hit by axe
where did fire or liquids hit the skin
reflections in mirrors or windows
etc.


But these simulations are not driven with real exact physics, they are only approximations and just based on them (simplified for performance) and cannot be used seriously for analysis, they are for shows. In some cases it can give approximate results, but in others there is no assurance that the result would'n be far from reality.

It's the other way around - you need analysis (or some reference) based on which you create the visual. Blender software has tools to match what you want visually.

It is a great tool to show others what you need, so they don't have to rely on imagination, but generally Blender tools lack accuracy to have merit in serious criminalistic proofing.

In cases where Blender is close to reality (as it should be for the visuals to feel believable) you will deduce the same with common knowledge and there won't be any need for such analysis.